Yes, there are still many active users due to the faucet feature. Especially in countries where the local currencies are severely undervalued and inflation is out of control. The official freebitco.in's thread in micro earnings sub-section on this forum is still active, and from times to times we can see some newbies sharing their big wins from faucet there.
I don't think so because faucet value is too small to make users to become active. They are active because they are ready to bet with their money, not only or mainly from faucet claim.
Claiming faucet and bet for fun is one of bet actions on Freebitco.in but I don't believe all gamblers join freebitco.in to bet for fun. Basically they bet to have both, fun and get rich or just to get rich. People who want to get rich more likely bet with their pocket money rather than from faucet. They can get big win from tiny claimed faucet coin but they won't get rich with it.